Was This Page Helpful?

Also of Interest

Test your
knowledge

Blood tests are done to help diagnose or rule out which of the following as the cause of pain in a single joint?

Lyme disease
Osteoarthritis
Psoriatic arthritis
Gout

Merck and the Merck Manuals

Merck & Co., Inc., Kenilworth, NJ, USA is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world. The Merck Manual was first published in 1899 as a service to the community. The legacy of this great resource continues as the Merck Manual in the US and Canada and the MSD Manual in the remainder of the world. Learn more about our commitment to Global Medical Knowledge.